Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is getting a signal from a sensor on the back wheels that is too strong. It's like when you turn the volume on a radio too high and it sounds distorted.
The rear drive shaft speed sensor is sending a signal to the vehicle's computer that is higher than expected, indicating a potential issue with the sensor or its circuit.
The C05F1 code is triggered when the powertrain control module (PCM) detects a higher than normal voltage signal from the rear drive shaft speed sensor. This could be due to a short circuit, a faulty sensor, or wiring issues.
• ABS warning light on
• Traction control system malfunction
• Inaccurate speedometer readings
• Faulty rear drive shaft speed sensor
• Short circuit in the sensor wiring
• Corroded or damaged connectors
PCM: Powertrain Control Module
ABS: Anti-lock Braking System
• Inspect the rear drive shaft speed sensor for damage.
• Check the wiring and connectors for corrosion or shorts.
• Use a multimeter to measure the voltage output of the sensor.
• Replace the rear drive shaft speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Chevrolet Silverado
• GMC Sierra
• Ford F-150
• Regularly inspect sensor wiring for damage.
• Keep connectors clean and free from corrosion.
• Perform routine maintenance checks.
Sensor Issue
• Do not ignore the ABS warning light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving in hazardous conditions until fixed.
Check with the vehicle manufacturer for specific warranty coverage on sensors.
This code has been associated with issues in vehicles with high mileage or those frequently driven in harsh conditions.
Moderate – It is advisable to address this issue soon to maintain proper vehicle safety systems.
Driving with a malfunctioning speed sensor can affect vehicle safety systems, such as ABS and traction control.
• Vehicle on a lift for safe inspection
• Engine off and battery disconnected
The rear drive shaft speed sensor is typically located near the rear differential or on the rear axle.
Q: Can I drive with the C05F1 code?
A: It's not recommended to drive with this code active as it can affect safety systems like ABS and traction control.
Q: How do I reset the C05F1 code?
A: After repairs, use an OBD-II scanner to clear the code, then test drive the vehicle to ensure the issue is resolved.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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